期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 106, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2019.106516
关键词
Palladium-yttrium alloying; Carbon nanofiber; Electrocatalyst; Oxygen reduction reaction
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2018M1A2A2061989, NRF-2019M3E6A1064735]
Pd-Y alloy nanoparticle-embedded carbon nanofiber (CNF) were sequentially synthesized by electrospinning a solution mixture containing Y precursor and polyacrylonitrile, stabilization, carbonization at 1200 degrees C, activation, and impregnation of Pd. The CNF acted as catalytic supports and templates, retaining the nanoparticle size at high temperatures; under these conditions, other nanomaterials would easily aggregate or sinter. To expose the surface of Y nanoparticles embedded into the CNF (Y-ACNF), mild and selective oxidation was conducted. The impregnated Pd exhibited the excellent degree of alloying with and dispersion on Y-ACNF, leading to outstanding activity with four-electron reaction of Pd-3/Y-ACNF for oxygen reduction reaction comparable to commercial platinum-based catalysts.
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